Advanced Physics for Brachytherapy 2018

Chapter 6: Calibration Using Free In-air Measurements 6.3. Ionization chambers to be used For HDR sources, chambers volumes > 0.5 cm 3 can be used (e.g. Baldwin- Farmer 0.6 cm 3 chamber). For LDR sources, chamber volumes up to 1,000 cm 3 may be used for sufficient signal, but have large non-uniformity correction factor uncertainties. For 192 Ir, chambers should have air-kerma calibration factors vary less than 5% between 60 Co and 60 keV.

6.4. Air kerma calibration of ionization chambers

6.5. Correction factors for free in-air measurements

6.6. Uncertainty of free in-air calibration

etc., etc.